What is histology in science?
Histology is the study of tissues and their structure. The structure of each tissue is directly related to its function, so histology is related to anatomy and physiology. Histology is also used extensively in biomedical research, to identify the causes and possible treatments for disease.
What are the uses of histology?
Histology is used to diagnose diseases in humans, animals, and plants and to analyze the effects of treatment. Histology is used during autopsies and forensic investigations to help understand unexplained deaths. In some cases, a cause of death may be evident from microscopic tissue examination.
What is the center of your brain called?
Brainstem. The brainstem (middle of brain) connects the cerebrum with the spinal cord. The brainstem includes the midbrain, the pons and the medulla.
Why does white matter stain so dark?
The substantia nigra is a third colored component found in the brain that appears darker due to higher levels of melanin in dopaminergic neurons than its nearby areas. Note that white matter can sometimes appear darker than grey matter on a microscope slide because of the type of stain used.
What is the Neuropil?
The neuropil is defined as the space between neuronal and glial cell bodies that is comprised of dendrites, axons, synapses, glial cell processes, and microvasculature.
Where is Neuropil found?
Location. Neuropil has been found in the following regions: outer neocortex layer, barrel cortex, inner plexiform layer and outer plexiform layer, posterior pituitary, and glomeruli of the cerebellum.
What are Neuropil threads?
Neuropil threads are made up of straight and paired helical filaments which consist of abnormally phosphorylated microtubule-associated tau proteins. It has been suggested that the threads have a major role in the cognitive impairment seen in Alzheimer disease.
What are Purkinje cells?
Purkinje cells are a unique type of neuron-specific to the cerebellar cortex. They are remarkable (and instantly recognizable) for their massive, intricately branched, flat dendritic trees, giving them the ability to integrate large amounts of information and learn by remodeling their dendrites.
What was the role of Purkinje?
Purkinje fibers play a major role in electrical conduction and propagation of impulse to the ventricular muscle. Many ventricular arrhythmias are initiated in the Purkinje fiber conduction system (eg. Here we will review properties of Purkinje fibers and cells, and compare them to those of ventricles.
What are Purkinje cells and where are they located?
Purkinje cells, also called Purkinje neurons, are neurons in vertebrate animals located in the cerebellar cortex of the brain. Purkinje cell bodies are shaped like a flask and have many threadlike extensions called dendrites, which receive impulses from other neurons called granule cells.
Where are Purkinje fibers located?
sub-endocardium
Are Purkinje fibers located in the atria?
The purkinje fibers are located in the atria. An arrhythmia is any change or deviation from the normal rate or rhythm of the heart.
How many Purkinje Fibres are there?
Purkinje fibers from dogs and sheep are the most frequently used. The number of usable fibers varies with each heart, and in the dog, ranges from three to eight. Long-term continuous recording from cardiac Purkinje fibers is possible because they contract less vigorously than atrial or ventricular muscle.